一类群签名方案抗联合攻击性的分析与对策

Analysis and Countermeasure of Coalition Resistance for a Class of Group Signature Schemes

文章对一类群签名方案提出了一个通用的联合攻击,并将其应用于三个新提出的群签名方案,证明了这三个方案均是不安全的。其次,总结了此类方案的共性,分析了它们易受联合攻击的原因并提出了一种新的能抵抗联合攻击的体制,将这种体制用于群签名方案的构造过程中将使方案具有抗联合攻击性。最后,应用该体制,给出了一个安全的群签名方案。

In this paper,we propose a universal attack scheme for a class of group signatures,and we apply the attack scheme to three new group signatures to prove that they are all not coalition resistant.Then we analyse the reason for them not being coalition resistant.Then we propose a new method to make group signature schemes coalition resistant.At last,we apply the method to set up a group signature scheme to show that it really works.